why did the nsa seek its buy-in now? >> what happened this year is different. hela cells, yes, have been used in almost every laboratory, including my own. now what we've had happen is read out the complete d.n.a. instruction book, the genome of hela cells, laying out all kinds of details about why those cells grow so rapidly, but also revealing something about henrietta's original d.n.a. instruction book, which,sh, has implications for the family, and her blood relatives raised concerns, rightly so, that this information being freely available on the internet might be placing them at risk for people learning things about their medical risks for the future, that they would like to keep private. >> warner: so this agreement you negotiated with the family, what does it grant them? what does it give them? >> well, over three long meetings in the evening in baltimore with the family-- and i give them a huge amount of credit for rallying together and dealing with some pretty complicated scientific facts-- ultimately, they are very much in favor of research going for